In the days before Hinchliffe did wargames figures they were known for producing probably the best range of 54mm artillery models around. Their 'catalogue' consisted of a folder containing loose leaf photos and descriptions of their models. I've now scanned the catalogue and put it on the Pages section of my blog to join the rest of the historical catalogues, etc, currently residing there.
https://easterngarrison.blogspot.com/p/ ... ge_12.html
Hinchliffe figures are currently owned by Hinds Figures though these 54mm artillery pieces are not available.
https://www.hindsfiguresltd.com/Hinchliffe.html